engIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-0123951004911Application of dimeric ortho-palladated complex of 2-methoxyphenethylamine in the Heck coupling reactionAbdol Hajipour1Fatemeh Abrishamif.abrishami@ch.iut.ac.ir2Pharmaceutical Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156, Iran. Department of Pharmacology, University of Wisconsin, Medical School, 1300 University Avenue, Madison, 53706-1532, WI, USAPharmaceutical Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156, Iran.The application of the [Pd{C6H3(CH2CH2NH2)-4-OMe-5-κ2-C,N}(μ-Br)]2 complex of 2-methoxyphenethylamine in the Heck coupling reaction was considered under both conventional and microwave irradiation conditions, and their results were compared. This complex is an efficient, stable and non-sensitive to air and moisture catalyst for the vinylation of substituted aryl halides with different electronic properties. The cross-coupled products were produced in good to excellent yields using a catalytic amount of this complex in N-methyl-2-pyrrolidone (NMP) at 130 °C. In comparison to conventional heating conditions, the reactions under microwave irradiation gave higher yields in shorter reaction times.http://ijc.iaush.ac.ir/article_4911_e1508a88f37458ff0ffbfda7ee04cb5a.pdfHeck reaction2-MethoxyphenethylamineCyclopalladated complexCatalystMicrowave irradiationengIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231011064912NanoZnO as an efficient & reusable catalyst for the preparation of 1,4-DHPs via Hantzsch reactionFatemeh Tamaddonftamaddon@yazduni.ac.ir1Somayeh Moradi2Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran.Department of Chemistry, Faculty of Science, Yazd University, Yazd 89195-741, Iran.Easily prepared nanoZnO was found to be as an efficient catalyst in the synthesis of 1,4-DHPs via four-component reaction of 1,3-dicarbonyls, aldehydes and ammonium carbonate in water at 60 °C. The prepared nanoZnO was characterized by XRD and FT-IR analysis, while the determined specific surface area of nano catalyst by BET method was 33 m2/g.http://ijc.iaush.ac.ir/article_4912_54e771ed38277c4c6d1a7b057a1e6a69.pdfNanoZnOFour-component reactionDHPsAmmonium carbonateengIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231071144913Triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} as an efficient and homogeneous catalyst for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-onesAbdolkarim Zareabdolkarimzare@yahoo.com1Roghayyeh Khanivar2Maria Merajoddin3Masoud Kazem-Rostami4Mohammad Mahdi Ahmad-Zadeh5Ahmad Reza Moosavi-Zare6Alireza Hasaninejad7Department of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, IranDepartment of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, IranDepartment of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, IranYoung Researchers Club, Takestan Branch, Islamic Azad University, Takestan, IranDepartment of Chemistry, Payame Noor University, PO BOX 19395-4697, Tehran, IranDepartment of Chemistry, University of Sayyed Jamaloddin Asadabadi, Asadabad, 6541835583, IranDepartment of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, IranBrønsted acidic ionic liquid triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} efficiently catalyzes the one-pot multi-component condensation of 2-naphthol with arylaldehydes and dimedone (5,5-dimethylcyclohexane-1,3-dione) under solvent-free conditions to afford 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in high yields and relatively short reaction times.http://ijc.iaush.ac.ir/article_4913_daff0ef2ff4b2dbccc750a1ab1917b9a.pdfBrønsted acidic ionic liquidTriethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl}12-Aryl-891012-tetrahydrobenzo[a]xanthen-11-one2-NaphtholArylaldehydeDimedone (55-dimethylcyclohexane-13-dione)engIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231151194914Introduction of two efficient catalysts for the synthesis of 1,8-dioxo-octahydroxanthene derivatives in the absence of solventFarhad Shirinishirini@guilan.ac.ir1Gholam Hossein Imanzadeh2Masoumeh Abedini3Maryam Akberi Dokhte-Ghaziani4Mohaddeshes Safarpoor Langroodi5Parisa Ghods Ghasemabadi6Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran.Department of Chemistry, College of Science, Mohaghegh-Ardabili University, Ardabil, I.R. Iran.Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran.Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran.Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran.Department of Chemistry, College of Science, Mohaghegh-Ardabili University, Ardabil, I.R. Iran. Department of Chemistry, College of Science, University of Guilan, Rasht, zip code 41335, I.R. Iran.1,3-Dibromo-5,5-dimethylhydantoin (DBH) and benzyltriphenylphosphoniumtribromide (BTPTB) were used as efficient catalysts for the promotion of the synthesis of 1,8-dioxo-octahydroxanthene derivatives (DOXOs) via a one-pot three component condensation of aldehydes and cyclic 1,3-dicarbonyl compounds in the absence of solvent.http://ijc.iaush.ac.ir/article_4914_096181ce12195c996388374d1002e380.pdf18-Dioxo-octahydroxanthenesaldehydesCyclic 13-dicarbonyl compounds3-Dibromo-55-dimethylhydantoinBenzyltriphenylphosphoniumtribromideSolvent-free conditionsengIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231211284915Magnetic Fe3O4 nanoparticles as a highly efficient catalyst for the synthesis of imidazoles under ultrasound irradiationJavad Safari1Zohre Zarnegar2Laboratory of Organic Compound Research, Department of Organic Chemistry, College of Chemistry, University of Kashan, P.O. Box: 87317-51167, Kashan, I.R., Iran.Laboratory of Organic Compound Research, Department of Organic Chemistry, College of Chemistry, University of Kashan, P.O. Box: 87317-51167, Kashan, I.R., Iran.To be fairly general and catalyst is easily separated by magnetic devices and can be reused without any apparent loss of activity for the reaction. Fe3O4 nanoparticles were prepared by chemical coprecipitation method and was found to be a mild and effective catalyst for the efficient, one-pot, three-component synthesis of 2,4,5-trisubstituted imidazoles at room temperature under ultrasound irradiation. The high yields of products and short reaction time were attributed to the nanosize of about 20 nm in which the catalyst could act as a nanoreactor. This methodology is found.http://ijc.iaush.ac.ir/article_4915_7bcc9c68aa846ba2b38f686fe93be7f8.pdfFe3O4 nanoparticlesImidazoleHeterogeneous CatalystUltrasound irradiationengIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231291334916Bi(NO3)3.5H2O: An efficient acidic reagent for synthesis of azo dyes at room temperatureBi Bi Fatemeh Mirjalilifmirjalili@yazduni.ac.ir1Abdolhamid Bamoniribamoniri@kashanu.ac.ir2Naimeh Salehi3Department of Chemistry, College of Science, Yazd University, Yazd, P.O.Box 89158-13149, I. R. Iran.Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, I.R.Iran.Department of Chemistry, College of Science, Yazd University, Yazd, P.O.Box 89158-13149, I. R. Iran.An one-pot method has been developed for the synthesis of azo dyes via sequential diazotization–diazo coupling of aromatic amines with coupling agents at room temperature in the presence of Bi(NO3)3. 5H2O. Short reaction times, high yields, a clean process, simple methodology, easy work-up and green ‎conditions are advantages of this protocol.‎http://ijc.iaush.ac.ir/article_4916_f3f7a6345b36c8b7ddd55da04fd0ea9a.pdfazo dyeBi(NO3)3.SiO2Stable diazonium saltsOne-pot synthesisengIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231351404917Photocatalytic efficiency of CuFe2O4 by supporting on clinoptilolite in the decolorization of acid red 206 aqueous solutionsAzar Bagheri Ghomiazar.bagheri@iauctb.ac.ir1Vahid Ashayeri2Department of Chemistry, Center Tehran Branch, Islamic Azad University, Tehran, Iran.Department of Chemistry, Center Tehran Branch, Islamic Azad University, Tehran, Iran.In this paper CuFe2O4, nanocrystalline powders were prepared. Also, the supported Cu ferrite was obtained by impregnation of the supports with Cu and Fe nitrates solutions, for calcination temperature 450 ºC. The samples were characterized by X-ray powder diffraction (XRD) and Fourier transform-infrared spectroscopy (FT-IR). Photocatalytic degradation of acid red 206 in water was studied. CuFe2O4 was supported on Clinoptilolite using solid-state dispersion (SSD) method. The results show that the CuFe2O4/zeoliteis an active photocatalyst. The maximum effect of photodegradation was observed at 10 wt. %CuFe2O4, 90 %wt. Clinoptilolite. A first order reaction with k = 0.123 min-1 was observed. The effects of some parameters such as pH, amount of photocatalyst, initial concentration of dye were examined.http://ijc.iaush.ac.ir/article_4917_e206df24a98e7e2d8a0c3a08f9c3ebf0.pdfPhotodegradationPhotocatalystsCuFe2O4/ZeolitesAcid Red 206ClinoptiloliteengIslamic Azad University, Shahreza BranchIranian Journal of Catalysis2252-02362345-48652012-09-01231411454918Urea-hydrogen peroxide/silica phosphoric acid-catalyzed oxidation- condensation Tandem reaction: One-pot synthesis of 2-substituted benzimidazoles from alcoholsAhmad Reza Momenimomeni-a@sci.sku.ac.ir1Heshmat Allah Samimi2Reyhaneh Jahanian3Faculty of Sciences, Shahrekord University, 115-381, Shahrekord, Iran.Faculty of Sciences, Shahrekord University, 115-381, Shahrekord, Iran.Faculty of Sciences, Shahrekord University, 115-381, Shahrekord, Iran.An efficient one-pot oxidation/condensation tandem process has been developed for the synthesis of 2-substituted benzimidazole derivatives from benzylic alcohols and 1,2-phenylenediamine with use of urea-hydrogen peroxide/silica phosphoric acid as a bifunctional catalyst. This method provides a rapid and efficient access to 2-substituted benzimidazoles.http://ijc.iaush.ac.ir/article_4918_4915496f67d669ea7ecc45002f800d6b.pdfUrea-hydrogen peroxideSilica phosphoric acidBenzimidazolesAlcohols